<!DOCTYPE html>
<html lang="ch">
<head>
    <meta charset=utf-8>
    <title>太极阴阳鱼特效</title>
    <style>
        *{
            padding: 0px;
            margin: 0px;
        }
        body{
            height: 100vh;
            width: 100%;
            overflow: hidden;
            background-image: linear-gradient(180deg, #2af598 0%, #009efd 100%);
            /*background: #111;*/
        }
        .square {
            width: 400px;
            height: 400px;
            position: relative;
            transform: rotate(45deg);
            -webkit-transform: rotate(45deg);
            -moz-transform: rotate(45deg);
            top:25%;
            left: 40%;
            animation: rotate infinite linear 5s;
            -webkit-animation: rotate infinite linear 5s;
            -moz-animation: rotate infinite linear 5s;
        }

        .rect {
            width: 400px;
            height: 200px;
            position: relative;
            /*border: 1px #d2d2d2 solid;*/
            border-bottom: none;
        }

        .inner_circle {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            position: absolute;
            z-index: 1;
        }

        .dot {
            width: 50px;
            height: 50px;
            position: absolute;
            left: 0;
            right: 0;
            top: 0;
            bottom: 0;
            margin: auto;
            border-radius: 50%;
        }

        .rect_one {
            border-radius: 200px 200px 0 0;
            background: white;
        }

        .rect_one_one {
            bottom: -100px;
            left: 0;
            background: black;
        }

        .rect_one_two {
            background: white;
        }

        .rect_two {
            border-radius: 0 0 200px 200px;
            background: black;
        }

        .rect_two_one {
            bottom: 100px;
            right: 0;
            background: white;
        }

        .rect_two_two {
            background: black;
        }

        @keyframes rotate {
            from {
                transform: rotate(0deg);
                -webkit-transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
                -webkit-transform: rotate(360deg);
            }
        }
    </style>
</head>

<body>

<div class="square">
    <div class="rect rect_one">
        <div class="inner_circle rect_one_one">
            <div class="dot rect_one_two"></div>
        </div>
    </div>
    <div class="rect rect_two">
        <div class="inner_circle rect_two_one">
            <div class="dot rect_two_two"></div>
        </div>
    </div>
</div>

</body>
</html>

